Solar Impulse plane

Credit: AFP/Getty Images

The Swiss-made solar-powered plane, Solar Impulse piloted by Bertrand Piccard, takes off from Rabat airport on July 6, 2012. The experimental solar-powered aircraft left for Madrid on its return journey to its home port in Switzerland, Morocco's news agency MAP reported. The flights are intended as a rehearsal for the goal of a round-the-world trip in 2014 by an updated version of the plane. AFP PHOTO/ABDELHAK SENNA (Photo credit should read ABDELHAK SENNA/AFP/GettyImages)